Portable spraying apparatus



Ej ABLE PORTABLE SPRAYING APPARATUS May ]5, 1951 Filed Aug. 25, 1948Patented May 15, 1951 OFFICE PORTABLE SPRAYING APPARATUS Eric Able,Birmingham, England Application August 25, 1948, Serial No. 46,025 InGreat Britain August 29, 1947 Claims. 1

This invention relates to new or improved portable spraying apparatusand has for one of its objects to provide a simple and efficient sprayerwhich is economical to manufacture and easy and safe to use, and whichhas a wide range of practical applications.

According to my invention portable spraying apparatus comprises areceiver for air under pressure adapted to be held in the hand and to beconnected by a flexible pipe to a tire pump or like means forcompressing air, a small container for the liquid to be sprayed, a tubeextending into the liquid and terminating in a nozzle or jet, and a headdetachably secured to the receiver and having formed in it a passagewhich, at an intermediate point in its length, is in communication withthe receiver, one end of the passage being open to atmosphere and theother terminating in a nozzle or jet adjacent to and having its axissubstantially at right angles to that of the first nozzle.

Preferably the liquid container is mounted within the receiver and thetube and nozzle for the liquid are carried by a closure for thecontainer which is mounted on or forms part of the detachable head.

To use the apparatus a quantity of the liquid to be sprayed is placed inthe container and the head is fitted and secured in position. The pumpis then operated and forces air under pressure into the receiver.

The air can escape freely from the open end of the passage in the headbut when the users finger or thumb is placed against the end of thepassage the air is forced out of the nozzle and the air stream as it isdirected across the liquid nozzle picks up liquid and sprays itcontinuously in a finely divided or atomized form.

The spraying of the liquid is thus controlled solely by the applicationof a finger or thumb to the open end of the passage in the head and canbe stopped or started instantly even if the pump is being continuouslyoperated. Preferably the open end of the passage in the head is in sucha position that the thumb can be applied naturally to it while thecontainer is held by the fingers and the palm of the hand.

This arrangement has the further advantage that it is impossible for thereceiver to be put under excessive pressure so that there is no risk ofthe receiver exploding.

One practical embodiment of my invention is illustrated by way ofexample in the accompanying drawings in which:

Figure 1 is a rear elevation of the apparatus.

Figure 2 is a side elevation.

Figure 3 is a plan.

Figure 4 is a vertical section through the upper part of the apparatus.

In the apparatus illustrated a is the air receiver or reservoir which isa cylinder or length of steel or other tubing closed at its lower end bya flanged closure 2) having at one side a connection for a flexible pipe0. This pipe may have at'its outer end a nipple d to fit into theordinary delivery connection of a foot-pump for pneumatic tires, or itmay have any other form of terminal for connection to a convenientsource of air under pressure.

The upper end of the cylinder a is closed by a flanged closure member e,the members e and b being soldered, brazed, or otherwise secured in anairtight manner to the cylinder.

The liquid container is a smaller cylinder f closed at its lower end andprojecting at its upper end for a short distance through an opening inthe top closure e in which it is soldered, brazed or otherwise securedin an airtight manner, The container f is arranged adjacent to one sideof the cylinder 11 as shown in the drawings. Projecting upwardly throughthe closure member e adjacent to the other side of the container is acylindrical rod g terminating in a short screwed spigot part h. This rodis drilled upwardly from its lower end to meet a transverse drilling 9'located a short distance above the closure member e. Fitting over theprojecting part of the rod g there is a head consisting of a horizontalmember it having a boss Z on its underside near one end, the boss andthe head being drilled vertically to fit over the rod.

Adjacent the other end the head carries on its underside a flanged cap madapted to fit over and close the upper end of the liquid container f.This cap carries a depending tube n of suflicient length to reach nearlyto the bottom of the container, the upper end of the tube being screwedinto the lower end of a vertical nozzle or jet p which is itself screwedinto the cap. I

The head It has a horizontal passage q drilled through it at the levelof the transverse drilling j in the rod. One end of this passage is opento atmosphere and the other end has screwed into it a jet or nozzle r ofwhich the axis is just above and at right angles to that of the liquidnozzle 1).

Thehead la is retained in position by a wingnut s screwed on to theupper end of the rod 9 above it, compressible washers 15 being fittedover the rod between the top closure e of the air receiver and the bossI and between the wing-nut and the head. A compressible washer u is alsoprovided in the cap m to seat against the upper end of the liquidcontainer. A vent hole 12 is provided in the cap m to allow air to enterthe liquid container to replace the liquid as it is used up.

By unscrewing the wing-nut s the head can be simply lifted off forfilling or for emptying and cleaning out the liquid container, and theliquid feed tube n and the nozzles are then readily accessible forcleaning.

The two nozzles may be fitted with lock-nuts w so that each can beadjusted in an axial direction relative to the other.

When air under pressure is fed into the receiver a, it passes up throughthe drilled lower end of the rod 9 into the horizontal passage q andescapes to atmosphere from the open end of the passage.

To spray liquid the operators finger or thumb is placed against the openend of the passage and the air is then forced out of the nozzle -r topick up liquid from the container 1 through the nozzle p and spray theliquid in a finely atomized form. The receiver a is of suificientcapacity to eliminate or smooth out pulsations of pressure if the air issupplied to the receiver by a tire pump so that a steady pressure ismaintained at the nozzle 1.

My improved apparatus can be used for spraying any liquid which can bepicked up in any air stream from a nozzle. For example it can be usedfor spraying paint or liquid polish, for spraying insecticides, or forspraying fertilizing hormones in horticulture or agriculture.

I claim:

l. Portable spraying apparatus comprising a closed receiver for airunder pressure adapted to be held in the hand, a flexible pipe attachedto said receiver for connecting said receiver to means for supplying airunder pressure, a container for liquid to be sprayed mounted in theupper part of the receiver and open at its upper end, a head detachablysecured to the top of the receiver and incorporating a closure for theliquid container, a tube carried by said closure and extendingdownwardly into the container, a vertical nozzle at the upper end ofsaid tube, a horizontal passage in said head open to atmosphere at oneend, a horizontal nozzle at the other end of said passage, said nozzlebeing adjacent to and having its axis at right angles to that of thefirst nozzle, and means for connecting said head to the receiverincluding a rod extending upwardly from the receiver, a vertical openingin the head to fit over said rod, said opening intersecting thehorizontal passage in the head, screw clamping means on the upper end ofthe rod, and an axial bore in said rod extending from its lower end tomeet a transverse drilling in said rod in alignment with said passage inthe head.

2. Portable spraying apparatus comprising a receiver for air underpressure including a fixed top closure, a container for liquid to besprayed open at its upper end, said container being arranged interiorlyof said receiver and secured to said closure in an opening thereof, ahead constituting a closure for said container, means in connection withsaid head and said receiver to secure the former detachably to thelatter, said head including a first nozzle in communication with theinterior of said container when the head is attached, and a secondnozzle in spray-forming relationship to said first nozzle, and an airduct between said second nozzle and said receiver, a first portion ofsaid duct being provided in said head, a second portion being providedin said means for securing said head to said receiver, and both saidportions being in communication when said head is attached.

3. Portable spraying apparatus comprising a closed receiver adapted forcommunication with means removed from the receiver for supplying airunder pressure thereto, a container open at its upper end and mountedwithin the upper part of said receiver, said container defining a singleunobstructed chamber for receiving liquid to be sprayed, a headdetachably secured to the top of the receiver and incorporatingintegrally therewith a closure for the upper end of the container, avertical nozzle on that part of the closure covering the upper end ofthe container, a straight tube connecting said nozzle with the lowermostregion oi the liquid receiving chamber, a straight horizontal passage insaid head open at both ends to atmosphere, a horizontal nozzlecommunicating with one end of said passage, said horizontal nozzle beingadjacent to and having its axis at right angles to that of the verticalnozzle, a vertical passage in said head communicating at one end withsaid horizontal passage at an intermediate point in its length, and anoutlet orifice in the upper part of said receiver through which airunder pressure from the receiver may pass continuously to saidhorizontal passage by way of said vertical passage which communicateswith said outlet orifice.

4, Portable spraying apparatus comprising a closed receiver for airunder pressure adapted to be held in the hand, a fiexible pipe attachedto said receiver for connecting said receiver to means for supplying airunder pressure, a container for liquid to be sprayed mounted in theupper part of the receiver and open at its upper end, said containerdefining an unobstructed chamber for storing liquid to be sprayed, ahead detachably secured to the top of the receiver and incorporatingintegrally therewith a closurerfor the container, :a straight tubecarried by said closure and extending into the container, a verticalnozzle at the upper end of said tube, a passage in the head having threebranches in communication with each other, one of said branches beingopen to atmosphere, and another of said branches terminating in a nozzleadjacent to and having its axis at right angles to that of the verticalnozzle and the remaining branch communicating with the interior of thereceiver.

5. Portable manually controlled spraying apparatus comprising a closedreceiver for air supplied under pressure from a source removed from thereceiver, a spraying liquid container defining a single unobstructedchamber, the container being mounted in said receiver and open at itsupper end, a, spraying head integral with a closure for the open end ofthe container, said spraying head being detachably secured to saidreceiver, a liquid nozzle on said closure communi- 5 eating with thelowermost part of said chamber, a horizontal air passage in the headopen to atmosphere at one end, a nozzle at the other end. of the airpassage, and a duct in the head connecting said passage at anintermediate point in its length with the interior of the receiver.

ERIC ABLE.

REFERENCES CITED The following references are of record in the file ofthis patent:

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